Open gui when block is powered by redstone?

[KeeganDeathman]

I was just wondering how to get a gui to open when a block is powered. I know how to do the gui, but not checking when the block is powered. any help?

[Moritz]

Wow cool idea! Its not that hard!

 

If you use an TileEntity than its very easy:

 

public int delay = 0;
public void updateEntity()
{
     if(worldObj.isBlockIndirectlyGettingPowered(xCoord, yCoord, zCoord))
     {
            EntityPlayer player = worldObj.getClosestVulnerablePlayer(xCoord, yCoord, zCoord, 3); //Gets the clostet player in a 3 blocks range;
            if(player != null)
            {
                  if(delay >= 100)
                  {
                        delay = 0;
                        player.openGui(modInstance, GuiID, xCoord, yCoord, zCoord);
                  }
                  else
                  {
                        delay++;
                  }
            }
            else
            {
                  delay = 0;
            }
     }
     else
     {
           delay = 0;
     }
}

The Delay is needed that the player can still close the gui.

Else the spam would be bad.

But thats all code. You search for a redstone signal.

Get the player (closest) check if its not null (safe function)

than you open the gui.

I hope it helps'